CN204140866U - A kind of seal arrangement based on cavity ring down spectroscopy technology - Google Patents
A kind of seal arrangement based on cavity ring down spectroscopy technology Download PDFInfo
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- CN204140866U CN204140866U CN201420410270.5U CN201420410270U CN204140866U CN 204140866 U CN204140866 U CN 204140866U CN 201420410270 U CN201420410270 U CN 201420410270U CN 204140866 U CN204140866 U CN 204140866U
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- interior pipe
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Abstract
The utility model discloses a kind of seal arrangement based on cavity ring down spectroscopy technology, relate to seal arrangement field, designing for solving the long problem such as non-adjustable of cavity ring down spectroscopy technology lumen.Sealing device has the outer tube being provided with sealed end and opening end and the interior pipe being provided with sealed end and opening end, in the portable insertion outer tube of opening end of interior pipe, be threaded connection and regulate pipe fitting extending amount, realize chamber long adjustable, also there is locking ring and seal ring, to realize the good sealing between inner and outer tubes, and ensure that the concentricity of inner and outer tubes, be convenient to the research of cavity ring down spectroscopy technology.
Description
Technical field
The utility model relates to a kind of seal arrangement field, is specifically related to a kind of for the seal arrangement in cavity ring down spectroscopy technology.
Background technique
It is low that cavity ring down spectroscopy technology has detectability, time resolution is high and be not subject to the advantages such as intensity of light source variable effect, therefore be widely used in the research of Aerosol Extinction, its principle is: be coupled in optical resonator by a bundle of pulsed laser, resonant cavity is by relatively pair of parallel, radius of curvature is r, reflectivity is the reflector composition of R, laser roundtrip between two reflectors in chamber, due to the delustring etc. of medium in the loss of reflector and chamber, laser intensity after output reflector can become single exponent ring-down in time, so this resonant cavity is also referred to as to decline swing chamber.
In vacuum, the light intensity time-varying relationship swung in chamber that declines is: i (t)=i
0exp [-(1-R) tc/L], wherein L is cavity length, and c is the light velocity, and t is the time of laser pulse in cavity; Swing in chamber when having gas when declining, light intensity time-varying relationship is i (t)=i
0exp{-[(1-R)+α
ext, gl] tc/L}, wherein α
ext, gfor the extinction coefficient of gas, l is the absorption optical path length of sample; Swing in chamber when passing into aerosol (being namely mixed with aerosol in gas) when declining, light intensity time-varying relationship becomes i (t)=i
0exp{-[(1-R)+α
ext, gl+ α
ext, sl] tc/L}, wherein α
ext, sfor aerocolloidal extinction coefficient, by measuring background gas and gas and aerocolloidal ring-down time (τ respectively
0and τ), just can obtain aerocolloidal extinction coefficient, i.e. α
ext, s=(1/ τ-1/ τ
0) L/cl, the visible aerocolloidal extinction coefficient of formula is directly proportional to the long L in chamber thus.
The long L in chamber has important function in cavity ring down spectroscopy technology, need by constantly adjusting the long L in chamber with the long L value in the chamber determining to be suitable for application-specific in conceptual phase, the single tube of the long L of lock chamber is mostly adopted in prior art, thus need to process the long cavity of different cavity respectively to meet the demand of the long adjustment in chamber in conceptual phase, process consumption cost consuming time, change cavity time-consuming and trouble, thus to research there is certain narrow limitation.
Model utility content
The purpose of this utility model is to provide a kind of seal arrangement based on cavity ring down spectroscopy technology, long adjustable with the chamber realizing seal arrangement.
For achieving the above object, the technological scheme that provides of the utility model is as follows:
A kind of seal arrangement based on cavity ring down spectroscopy technology, comprise the interior pipe being provided with sealed end and opening end, the outer tube being provided with sealed end and opening end, suction port and relief opening, in the portable opening end being inserted in described outer tube of the opening end of described interior pipe, form Seal cage; Described suction port is connected with described Seal cage with relief opening.
Preferably, the outer peripheral surface of described interior pipe is provided with outside thread, and the inner peripheral surface of outer tube is provided with internal thread, and the opening end of described interior pipe is threaded connection in the inside of described outer tube.
Further, the seal arrangement that the utility model provides also comprises locking ring and seal ring, and described locking ring and seal ring are nested with all slidably on described interior pipe, and described seal ring is located between described locking ring and described outer tube opening end;
Further, described locking ring is provided with first ring connected in star inside the end face near described outer tube opening end side;
Further, the second annular groove is provided with inside the end face of the connecting end of described outer tube and described interior pipe;
Further, described seal ring is placed between described first ring connected in star and described second annular groove;
Preferably, described locking ring is threaded connection the outside in described interior pipe.
Further, the sealed end of described outer tube adopts the first cavity flange welding to form, and described interior pipe adopts the second cavity flange welding to form; Preferably, described suction port is located on the outer tube of the first cavity flange side;
Preferably, described relief opening is located on the interior pipe of the second cavity flange side, and is located between described second cavity flange and described locking ring.
When locking ring is in locked position, described seal ring is locked ring and is pressed in the cavity that first ring connected in star and the second annular groove formed jointly, realizes the sealing between inner and outer tubes, and ensure that the concentricity of inner and outer tubes; When locking ring is in non-locked position, locking ring and seal ring can mutual noninterferences.
The connection of described inner and outer tubes is not limited to and is threaded, and can also be that buckle connects or other Placements; Described locking ring is also not limited to the connection of interior pipe and is threaded, and can realize locking ring to the compression of seal ring and then the effect playing sealing by clip connected.
The beneficial effects of the utility model are:
(1) being threaded by inner and outer tubes, makes the extending amount of pipe fitting can free adjusting, immediately changes chamber long according to the demand of research.
(2) when locking ring is in locked position, seal ring is pressed in the cavity of annular groove formation by locking ring, seals, good airproof performance between inner and outer tubes, and steadiness is strong, is conducive to the accurate research of spectral technique.
(3) inner and outer tubes are by the connection of seal ring and locking ring, ensure that the concentricity of inner and outer tubes, make laser with one heart through front and back two panels high reflective mirror, decrease the operation regulating cavity.
Accompanying drawing explanation
Fig. 1 is schematic diagram of sealing device of the present utility model;
Nonlocking structural representation between the seal arrangement inner and outer tubes that Fig. 2 provides for the utility model;
In figure:
1, interior pipe; 2, outer tube; 31, the first cavity flange; 32, the second cavity flange; 41, suction port; 42, relief opening; 5, seal ring; 6, locking ring; 71, the first cavity flange 72, second cavity flange.
Embodiment
The technical solution of the utility model is further illustrated by embodiment below in conjunction with accompanying drawing.
See Fig. 1,2, a kind of seal arrangement based on cavity ring down spectroscopy technology: comprise the interior pipe 1 being provided with sealed end and opening end, the outer tube 2 being provided with sealed end and opening end, suction port 41 and exhaust 42, forms Seal cage in the portable opening end being inserted in described outer tube 2 of the opening end of described interior pipe 1; Described suction port 41 is connected with described Seal cage with relief opening 42, realize regulating chamber long by mobile interior pipe position, concrete mode is threaded connection, the outer peripheral surface of described interior pipe 1 is provided with outside thread, the inner peripheral surface of outer tube 2 is provided with internal thread, the opening end of described interior pipe 1 is threaded connection in the inside of described outer tube 2, is threaded connection the extending amount changing pipe fitting, and then it is long to change chamber.
A kind of seal arrangement based on cavity ring down spectroscopy technology that the present embodiment provides, also there is locking ring 6 and the seal ring 5 of outer surface annular knurl, described locking ring 6 and seal ring 5 are nested with all slidably on described interior pipe 1, and described seal ring 5 is located between described locking ring 6 and the opening end of described outer tube 2, described locking ring 6 is threaded connection the outside in described interior pipe 1, and described locking ring 6 outer surface annular knurl operationally can play anti-skidding effect.Locking ring 6 is provided with first ring connected in star 71 inside the end face near described outer tube 2 opening end side, be provided with the second annular groove 72 inside the end face of described outer tube 2 opening end, described seal ring 5 is placed between described first ring connected in star 71 and described second annular groove 72.The sealed end of interior pipe 1 and outer tube 2 is by adopting welding cavity flange to realize sealing, the sealed end of outer tube 2 welds the first cavity flange 31, the sealed end of interior pipe 1 is welded with the second cavity flange 32, described suction port 41 is located on the outer tube 2 of the first cavity flange 31 side, described relief opening 42 is located on the interior pipe 1 of the second cavity flange 32 side, and described relief opening 42 is located between described second cavity flange 32 and described locking ring 6.The chamber formed between interior pipe 1 and outer tube 2 is long adjustable, therefore a maximum Seal cage and minimum Seal cage can be formed, the position of described suction port 41 can be determined according to the position forming pipe 1 in minimum Seal cage, namely can not be located in the screw thread intersection of interior pipe 1 and outer tube 2, hinder it to be communicated with.
The connection of interior pipe 1 and outer tube 2 is not limited to and is threaded, also can be that multiple buckle is set in outer tube 2, interior pipe 1 realizes regulating chamber long by linking to connect with different cards, locking ring 6 and the connection of interior pipe 1 also can be locked by clip or other modes realize connecting, and are not limited to and are threaded.When regulate the extending amount between inner and outer tubes meet suitable chamber long time, locking ring needs to lock pipe fitting, to realize the sealing between inner and outer tubes, and ensure the concentricity of inner and outer tubes, make laser with one heart through front and back two panels high reflective mirror, reduce the operation regulating cavity position, when locking ring is in locked position, described seal ring is locked ring and is pressed in first ring connected in star 71 and the common cavity formed of the second annular groove 72, the sealing in realizing between pipe 1 and outer tube 2; When locking ring is in non-locked position, seal ring can depart from described second annular groove, and locking ring and seal ring all can be in the free position of relief opening side.
More than the embodiment provided by reference to the accompanying drawings; only realize preferred version of the present utility model to be not intended to limit; anyly embodiment of the present utility model is modified or equivalent replacement is carried out to portion of techniques feature; and do not depart from the spirit of technical solutions of the utility model, all should be encompassed in the utility model request protection technological scheme scope in the middle of.Protection domain of the present utility model also comprises those skilled in the art and does not pay the thinkable any alternate embodiments of creative work.
Claims (10)
1. the seal arrangement based on cavity ring down spectroscopy technology, it is characterized in that: comprise the interior pipe (1) being provided with sealed end and opening end, the outer tube (2) being provided with sealed end and opening end, suction port (41) and relief opening (42), in the portable opening end being inserted in described outer tube (2) of the opening end of described interior pipe (1), form Seal cage; Described suction port (41) is connected with described Seal cage with relief opening (42).
2. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 1, it is characterized in that: the outer peripheral surface of described interior pipe (1) is provided with outside thread, the inner peripheral surface of outer tube (2) is provided with internal thread, and the opening end of described interior pipe (1) is threaded connection the inside in described outer tube (2).
3. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 1, it is characterized in that: also comprise locking ring (6) and seal ring (5), described locking ring (6) and seal ring (5) are nested with all slidably on described interior pipe (1), and described seal ring (5) is located between the opening end of described locking ring (6) and described outer tube (2).
4. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 3, is characterized in that: described locking ring (6) is provided with first ring connected in star (71) inside the end face near described outer tube (2) opening end side.
5. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 4, is characterized in that: be provided with the second annular groove (72) inside the end face of the opening end of described outer tube (2).
6. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 5, is characterized in that: described seal ring (5) is placed between described first ring connected in star (71) and described second annular groove (72).
7. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 3, is characterized in that: described locking ring (6) is threaded connection the outside in described interior pipe (1).
8. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 3, it is characterized in that: the sealed end of described outer tube (2) adopts the first cavity flange (31) to be welded, the sealed end of described interior pipe (1) adopts the second cavity flange (32) to be welded.
9. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 8, is characterized in that: described suction port (41) is located on the outer tube (2) of described first cavity flange (31) side;
Described relief opening (42) is located on the interior pipe (1) of described second cavity flange (32) side, and described relief opening (42) is located between described second cavity flange (32) and described locking ring (6).
10. a kind of seal arrangement based on cavity ring down spectroscopy technology according to claim 6, it is characterized in that: the locked ring (6) of described seal ring (5) is pressed in first ring connected in star (71) and the common cavity formed of the second annular groove (72), the sealing in realizing between pipe (1) and outer tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410270.5U CN204140866U (en) | 2014-07-24 | 2014-07-24 | A kind of seal arrangement based on cavity ring down spectroscopy technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410270.5U CN204140866U (en) | 2014-07-24 | 2014-07-24 | A kind of seal arrangement based on cavity ring down spectroscopy technology |
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| Publication Number | Publication Date |
|---|---|
| CN204140866U true CN204140866U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420410270.5U Active CN204140866U (en) | 2014-07-24 | 2014-07-24 | A kind of seal arrangement based on cavity ring down spectroscopy technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141792A (en) * | 2014-07-24 | 2014-11-12 | 昆山禾信质谱技术有限公司 | Sealing device based on cavity ring-down spectroscopy technology |
| CN105806805A (en) * | 2016-04-29 | 2016-07-27 | 河南省日立信股份有限公司 | Extensible test platform based on tunable semiconductor laser absorption spectrum technology |
-
2014
- 2014-07-24 CN CN201420410270.5U patent/CN204140866U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141792A (en) * | 2014-07-24 | 2014-11-12 | 昆山禾信质谱技术有限公司 | Sealing device based on cavity ring-down spectroscopy technology |
| CN105806805A (en) * | 2016-04-29 | 2016-07-27 | 河南省日立信股份有限公司 | Extensible test platform based on tunable semiconductor laser absorption spectrum technology |
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